Who blocks AI · #1158 in the Majestic Million
robots.txt · checked 9 Nov 2026
Does pcre.org block AI crawlers?
We couldn’t check pcre.org: its server didn’t answer our request for /robots.txt.
GPTBotUnknownOAI-SearchBotUnknownClaudeBotUnknownPerplexityBotUnknownGoogle-ExtendedUnknownCCBotUnknown- robots.txt
- its server didn’t answer our request for /robots.txt
- llms.txt
- not checked
- Checked
- 9 November 2026, as canaicrawl. We check again every week.
What do the bots actually get?
This page reads robots.txt, which states what pcre.org asks of crawlers. A firewall or CDN can still refuse a bot that robots.txt allows. The live check requests the page as each bot and shows the status it gets.
Run a live check on pcre.org Test a path in the robots.txt tester
History
- 19 October 2026: first checked, robots.txt couldn’t be read.
- 26 October 2026: robots.txt readable again.
- 2 November 2026: robots.txt couldn’t be read.